997149 has 8 divisors (see below), whose sum is σ = 1334560. Its totient is φ = 662256.

The previous prime is 997147. The next prime is 997151. The reversal of 997149 is 941799.

It is an interprime number because it is at equal distance from previous prime (997147) and next prime (997151).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 997149 - 2¹ = 997147 is a prime.

It is a super-2 number, since 2×997149² = 1988612256402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699 + ... + 1575.

It is an arithmetic number, because the mean of its divisors is an integer number (166820).

2⁹⁹⁷¹⁴⁹ is an apocalyptic number.

It is an amenable number.

997149 is a deficient number, since it is larger than the sum of its proper divisors (337411).

997149 is a wasteful number, since it uses less digits than its factorization.

997149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259.

The product of its digits is 20412, while the sum is 39.

The square root of 997149 is about 998.5734825239. The cubic root of 997149 is about 99.9048762100.

The spelling of 997149 in words is "nine hundred ninety-seven thousand, one hundred forty-nine".